Process for the filtration of furnace-gases.



P. MLLER, O. JOHANNSEN & P. PAPE. PRooEss FOR THB FILTRATION 0F PURNAGB GASES.

APPLIGATION FILED JAN.5. 1911.

1,022,496. Patented Apr. 9, 1912.

3 SHEETSHSHEET 1.

P. MLLER, 0. JOHANNSEN L P. PAPE. PROCESS POB. THE FILTRATION 0F PURNAUE GASES. APPLIGATIUN FILED JAN.5.1911.

1,022,496, Patented Apr. 9, 1912l 3 SHEETS-SHEET 2.

P. MLLER, 0. JOHANNSBN P P. PAPE. PROCESS FOB. THE FILTRATION 0F FUBNACE GASES.

APPLmA'moN rum JAN. 5, 1.911. L,O22,436, Patented Apr. 9, 1912.

a SHEETS-SHEET 3.

tufo) would l still (mimi- @inf part 0f the water vapor ,onuimed th'erig to be condensed, which condensed water would render the dirlar'd 'lt-ifmmtetlbe presented that theabrus mtenhxlsvoui" {,iyn". westighlim coke;

charge, t usingel'linitzA lou the direction of the gases which, seen, may eont'aet with the upper the water 'i and are thereby cooled and same time supplied with the necessary After leaving the cooler, the gas which has now been cooled to about the dew-point passes through a conduit Z into a heater v which comprises a plurality of' tubes m, to which by means of a )ipe w steam, hot air or the like may be conducted for heating purposes. The gases from the conduit` l surround the tubes m and the temperature of the gases is hereby some what raised and it is found that, incrustation of' the tubes docs not` take place and that the tubes are only very lightly dust. After the subsequent heating of the gases in this way, the gases are conducted by way of a tube r, to a filtering chamber f, in which the gas passes through fibrous material w of vegetable or animal origin and preferably in the form of the usual tubular fabric. The dust particles in the gas are thereby retained by the fibrous material and subsequently fall into Bie lower part 0 of the chamber f, where the dust in is removed by means of a conveyer l] into trucks or the like s' the clean gas passes through the tube d into a t'an c and from there into the piping b for. use. "lhe gas is drawn through the appa ratus by means of' the exhauster e.

It' the gas itself should have a sufficiently high degree ot moisture, so that there is no possibility of the filter being destroyed, then the mostening process may be dispensed with as 4shown at Fig. L). Further description thereof is unnecessary as otherwise the operation is identical with that of Fig. l.

Instead of ming reheating apparatus, as shown in Figs. l and 2, the arrangement may be in the t'orm shown in Fig. 3, in

surface of at the 1 covered with t t y ru'rnu Paru. t t

it will be which only a part of the gases requires to be cooled, The gases are led from the furnace to the collecting tube h and from thence t by way of the tube 1. and through a suitable valve t to the cooler c and through a valve to a branch pipe u, with the gases from the cooler le aty the oint l', so that part of the gases is passed through the cooler lo and cooled therein, while the remainder of the gases passes direct to the point c and there mixes wit-h the cooled gas, so that the desired temperature intermediate the hereinbefore described limits is attained.

We claim:

1. A process for the dry filtration of fun nace gases, which comprises, firstly, cooling the to the dew point, thereafter somewhat` reheating the and then passing the gases through filter material.

2. A process f'or the dry filtration of furnace gases, which consists, firstly, in cooling the gases to the dew-point and at the same time moisteuing the gases, thereafter somewhat reheatingfthe gases and then passing the gases through filter material.

A. process for the dry filtration of furnace gases, which comprises, firstly, cooling a part of the gases to the dew point, thereafter somewhat reheating the cooled gases by mixing with uneooled gases and then passing the gases through filter material.

in witness whereof we have hereunto set our hands inthe presence of two witnesses.

Fmnnlnon MLLER. (')T'ro .l onAN N snN.

litnessesz litem-mnu Itanium, JouANN Miilmnu.

which communicates 

